摘要
在油田开发过程中 ,注水开采以后 ,注气是提高采收率的一种重要方法。CO2 混相和非混相驱提高采收率的效果与地层原油的性质密切相关。通过PVT分析和混相压力的测定 ,研究地层原油性质和注气后地层流体性质变化情况可为注气决策提供基本依据。分别选取了不同采油厂有代表性的 5个区块 ,进行地层原油相态特征和注CO2 后流体相态特征研究和对比分析 ,测定其中的两个区块地层原油的最小混相压力 ,评价辽河油田稀油区的地层流体性质和预测注CO2 提高采收率潜力。结果表明 :辽河稀油区注CO2 吞吐提高采收率有一定的潜力 ,但难以到达CO2
It is an important way to enhance oil recovery through gas injection after injecting water. The efficiency of EOR of carbon dioxide injection relates closely to the properties of crude oil. Whether carbon dioxide injection can be conducted will be decided according to PVT parameters, MMP of crude oil with CO 2 and crude oil properties after CO 2 injection. We pick 5 typical oil samples from different oil companies in Liaohe oil field to study the phase behavior characterization and analyze the oil properties after the crude oil is miscible with CO 2 . We also measured the minimum miscible pressures of two oil samples, according to which we evaluated the crude oil properties and analyze the possibility of CO 2 injection. The results showed that CO 2 injection in Liaohe light oil district can enhance oil recovery, but it is difficult for crude oil to be miscible with injected CO 2 .
出处
《西南石油学院学报》
CSCD
2001年第2期30-32,共3页
Journal of Southwest Petroleum Institute
基金
"九五"国家科技攻关项目"注气提高采收率室内机理研究"!(96-12 1-0 7-0 4)
关键词
提高采收率
注二氧化碳
高压物性
辽河油田
enhanced oil recovery, carbon dioxide injection, PVT, Liaohe oil field
